Improvement in electro-magnetic locks



H. L. ROOSEVELT.

ELECTROMAGNETIC LOCK. No.178,382. Patented June 6,1876.

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WITNESSES ATTORNEYS.

PETERS, FMOTO-LITROGRAPHER. WASNlNGTON, D C.

UNITED STATES PATENT OFFICE.

HILBORNE L. ROOSEVELT, OF NEW YORK, N. Y.

IMPROVEMENT IN ELECTRO-MAGNETIC LOCKS.

Specification forming part of Letters Patent No. 178,382, dated June 6, 1876; application filed- Apri14, 1876. I

To all whom it may concern:

Be it known that I, HILBORNE L. RoosE- VELT, of the city, county, and State of New York, have invented a new and Improved Electric Look, of which the following is a specification:

In the accompanying drawing, Figure l representsa front elevation of my improved electric lock and Figs. 2 and 3 are, respectively, vertical, transverse, and horizontal sections on the lines o c and war of the same.

Similar letters of reference indicate corresponding parts.

My invention relates to an improved electric lock for office-doors and other purposes; and it consists in -the armature of an electromagnet that retains a swinging arm with two sliding and spring-acted bolts, of which one is withdrawn for opening the door, when the arm is released, by the attraction of the armature, and by the action of the spring of the second bolt, which is actuated and set by the closing of the door, ready for throwing open the first bolt on the action of the magnet.

In the drawing, A represents a small electro-magnet that is placed within the casing of a lock, and connected in the usual manner to a battery for actuating the armature B of the same. The armature B locks, by a recess or detent, a, at its upper side, a swinging arm, 0, that is released by the attraction of the armature to its magnet as soon as the circuit is closed by a key or button at the desk or other place or places from which the door to which the lock is attached is to be opened. The pivoted arm 0 is placed in connection with two sliding and spring-acted bolts, D and E, the arm 0 engaging the bolt D by entering a slotted recess of the same, and bolt E by passing around the same and engaging projecting pins. The bolts are guided in suitable manner parallel to each other, to pro guce jointly the opening and closing. of the oor.

The lower bolt D is thrown outwardly to look into the socket-hole of the door by a spiral spring, 01, carrying the swinging arm 0 forward until retained by the armature, so as to securely close the lock.

The upper bolt E is provided with a strong spiral spring, 0, that is placed between the swinging arm 0 and a shoulder of the bolt, and made of such power that the action of the spring 01 of the lower bolt is overcome, when the swinging arm is released from the armature, and thereby bolt D thrown back by arm 0, so as to open the door.

The upper bolt E is not intended to be thrown into a socket hole of the door; but serves for the purpose of being carried back by the closing of the door, so as to compress its spiral spring e, and store up the power required for opening the lock on the depression of the button. The ends of both bolts are cut off at a bevel to be more easily worked by the inclined face-plate of the door.

The closing of the door forces both bolts back into the lock, the lower being instantly thrown by its spring into the socket-hole to close the door, the other being in readiness to carry the swinging arm and lower bolt sidewise for opening the door on the release of V the swinging arm. The instant the armature is attracted the spring of the upper bolt is thrown into action, and slides the lockingbolt into open position, so as to admit the opening of the door, and thereby, by the action of both springs, the outward motion of both bolts, which are then ready to be set again by the closing of the. door, being also engaged at the same time by the armature.

If desired, a small rod and button connecting with the spring-acted rear arm of the armature, may be provided, for admitting the opening of the door by mechanical means on depressing the button, whenever it is desired to open the door without touching the actuating-key.

Having thus described my invention, I claim as new and desire to secure by Letters Patent-- 1. In an electric lock, the combination of the detent-armature of an electro'magnet with a swinging lever, connected to two sliding and spring-acted bolts, so as to open the locking-bolt by the spring of second bolt when the armature is attracted, substantially in the manner and for the purpose set forth.

2. In an electric lock, the combination of to act on the lever of the locking-bolt when the locking spring-bolt with a swinging lever said lever is released from its detent mechanand a second bolt and spring that are set by ism, substantially as specified.

the closing of the door into position to open the lock-bolt on the release of the lever, sub- HILBORNE ROOSEVELT stantially as described. Witnesses:

3. In an electric look, a sliding bolt and PAUL GOEPEL,

spring, set by the closing door into position '1. B. MOSHER. 

